Compare variables and choose the highest

Hi! I´m working on a quiz that have 4 questions with 3 options each.

Q1 Which actionscript forum has the coolest viewers?
B: Kirupa
C: Stylegala

Now, if the surfer choose more A options than B or C he gets one result message, if he choose more B options than A or C he gets another result message.

And now, my question - how do I compare more than one variables?

Best regards